<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="app">
    <div>我是:{{count}} ,我的今年:{{age}}</div>
    <div>{{countPlusAge}}</div>
</div>
</body>
<script src="../../js/vuex.js"></script>
<script src="../../js/vue.js"></script>
<script type="text/javascript">
    const store=new Vuex.Store({
        state:{
            name:'句号',
            age:18
        }
    })
    var vm=new Vue({
        el:'#app',
        store,
        data(){
            return{
                count:1
            }
        },
        computed:Vuex.mapState({
            //箭头函数使得代码更加可靠
            name: state=>state.name,

            //传字符串参数age等同于state=>state.age
            age:'age',

            //为了能够使用this获取局部状态，必须使用常规函数
            countPlusAge(state){
                return state.age+this.count
            }
        })
    })
</script>
</html>
